2305J - QBL Double Row Self-Aligning Bearing - 25x62x24 6218.zz.SKF the 62 designates this as

the 62 designates this as a deep groove ball bearing in ISO dimensional series 2 - the series simply denotes the outer diameter and width independent from the inside diameter

This 1212EKTN9/C3 bearing is a double row

79 10 CTR SU M P3 Series - NSK - Ultra Light Bore Size - 50mm 15 Degree Contact Angle Single Universal Medium Preload Precision Rating

The 2RS1 code indicates that this bearing is equipped with contact seals on both sides

This GE40FO 2RS bearing is a metric steel/steel spherical plain bearing with a rubber seal on both sides of the bearing and a standard radial internal clearance

2305J - QBL Double Row Self-Aligning Bearing - 25x62x24 6218.zz.SKF the 62 designates this asThis 2305J bearing is a double row, extra wide series, metric self aligning bearing with a steel cage and a normal radial internal clearance. The bearing's dimensions are 25x62x24. 23 05 j Extra Wide Bore Size 25mm Pressed Steel Cage Normal Radial Internal Clearance